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https://www.readbyqxmd.com/read/28087254/anti-diabetic-drug-metformin-dilates-retinal-blood-vessels-through-activation-of-amp-activated-protein-kinase-in-rats
#1
Asami Mori, Eriko Ishikawa, Tomoyo Amano, Kenji Sakamoto, Tsutomu Nakahara
The aim of this study was to examine whether metformin, a biguanide anti-hyperglycemic drug, dilates retinal blood vessels in rats. Ocular fundus images were captured with an original high-resolution digital fundus camera in vivo and diameters of retinal blood vessels were measured. Both systemic blood pressure and heart rate were continuously recorded. Metformin (0.01-0.3mg/kg/min) increased diameters of retinal blood vessels in a dose-dependent manner. This retinal vasodilator effect of metformin was abolished by compound C, an inhibitor of AMP-activated protein kinase (AMPK), and N(G)-nitro-L-arginine methyl ester, an inhibitor of nitric oxide (NO) synthase...
January 10, 2017: European Journal of Pharmacology
https://www.readbyqxmd.com/read/28078246/the-effects-of-crocin-insulin-and-their-co-administration-on-the-heart-function-and-pathology-in-streptozotocin-induced-diabetic-rats
#2
Amir Abbas Farshid, Esmaeal Tamaddonfard, Masoumeh Moradi-Arzeloo, Navideh Mirzakhani
OBJECTIVE: Crocin is a saffron constituent with a potent anti-oxidant activity. The present study investigated the effects of crocin and insulin treatments (alone or in combination) on cardiac function and pathology in diabetic rats. MATERIALS AND METHODS: Diabetes was induced by intraperitoneal (i.p.) injection of streptozotocin (STZ, 50 mg/kg). Thereafter, crocin (5, 10 and 20 mg/kg, i.p.), subcutaneous (s.c.) injection of insulin (4 IU/kg) and their combination were administered for eight weeks...
November 2016: Avicenna Journal of Phytomedicine
https://www.readbyqxmd.com/read/28078186/soluble-receptor-for-advanced-glycation-end-products-improves-stromal-cell-derived-factor-1-activity-in-model-diabetic-environments
#3
Melissa Przyborowski Olekson, Renea A Faulknor, Henry C Hsia, Ann Marie Schmidt, François Berthiaume
Objective: In diabetes, hyperglycemia causes the accumulation of advanced glycation end products (AGEs) that trigger reactive oxygen species (ROS) generation through binding the receptor for AGEs (RAGE). Because exogenous growth factors have had little success in enhancing chronic wound healing, we investigated whether hyperglycemia-induced AGEs interfere with cellular responses to extracellular signals. We used stromal cell-derived factor-1 (SDF-1), an angiogenic chemokine also known to promote stem cell recruitment in skin wounds...
December 1, 2016: Advances in Wound Care
https://www.readbyqxmd.com/read/28073120/nano-pelargonidin-protects-hyperglycemic-induced-l6-cells-against-mitochondrial-dysfunction
#4
Asmita Samadder, Debojyoti Tarafdar, Suresh K Abraham, Kumaresh Ghosh, Anisur Rahman Khuda-Bukhsh
Nano-encapsulation of several natural products has become an important tool in enhancing the bioavailability of some modern drugs against many diseases. Pelargonidin is an anthocyanidin found in many fruits and vegetables. Pelargonidin is loaded with poly-lactide-co-glycolic-acid, a non-toxic biodegradable polymer, to produce nano-pelargonidin. Size, morphology, zeta potential, and planar uniformity of formulated nano-pelargonidin were determined by atomic force microscopy and dynamic light scattering. The time required for cellular entry, folds of nano-pelargonidin, and drug encapsulation efficiency of poly-lactide-co-glycolic-acid were also ascertained...
January 10, 2017: Planta Medica
https://www.readbyqxmd.com/read/28070056/a-case-of-idiopathic-type-1-diabetes-with-subsequent-recovery-of-endogenous-insulin-secretion-despite-initial-diagnosis-of-fulminant-type-1-diabetes
#5
Keizo Kaneko, Chihiro Satake, Junpei Yamamoto, Hironori Takahashi, Shojiro Sawada, Junta Imai, Tetsuya Yamada, Hideki Katagiri
Fulminant type 1 diabetes is characterized by remarkably rapid and complete β-cell destruction. The established diagnostic criteria include the occurrence of diabetic ketosis soon after the onset of hyperglycemic symptoms, elevated plasma glucose with relatively low HbA1c at the first visit, and extremely low C-peptide. Serum C-peptide levels remain extremely low over a prolonged period. A 26-year-old-man with diabetic ketosis was admitted to our hospital. His relatively low HbA1c (7.6 %), despite marked hyperglycemia (593 mg/dL) with marked ketosis, indicated abrupt onset...
January 6, 2017: Endocrine Journal
https://www.readbyqxmd.com/read/28068626/effects-of-the-activation-of-heme-oxygenase-1-on-hormonal-and-metabolic-changes-in-rats-fed-a-high-fat-diet
#6
Tomasz Szkudelski, Kamila Dłużewicz, Jan Sadoch, Katarzyna Szkudelska
Heme oxygenase-1 (HO-1) is the inducible isoform of the heme oxygenase system, which catalyzes heme degradation. Up-regulation of this enzyme under pathological conditions is associated with beneficial effects in the whole organism. However, the potential of HO-1 in the alleviation of disturbances induced by a high-fat diet (HFD) is poorly elucidated. The present study was undertaken to determine the effects of pharmacological activation of HO-1 by hemin on some hormones and metabolic parameters in rats fed an HFD for 8 weeks...
January 6, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28066634/microrna-and-hyperglycemic-memory-in-the-diabetic-heart
#7
COMMENT
Shinji Ogawa, Yasuhide Okawa, Koshi Sawada, Yoshihiro Goto, Soh Hosoba, Syunsuke Fukaya
No abstract text is available yet for this article.
November 2016: Journal of Thoracic Disease
https://www.readbyqxmd.com/read/28065675/altered-expression-of-irs2-and-grb2-in-demyelination-of-peripheral-neurons-implications-in-diabetic-neuropathy
#8
Mallahalli S Manu, Kuruvanthe S Rachana, Gopal M Advirao
Demyelination of the peripheral nerves and dysfunction of Schwann cells (SCs) are the chronic complications involved in the development of peripheral neuropathy among diabetic patients. Insulin signaling plays an important role in restoring the myelin proteins in diabetic peripheral neuropathy (DPN). Since insulin levels are altered in diabetes, it becomes of great interest to appreciate the role and regulation of docking and adaptor protein, how these proteins respond to variations in the levels of insulin as experienced in juvenile diabetes...
December 29, 2016: Neuropeptides
https://www.readbyqxmd.com/read/28063402/murine-strain-differences-in-inflammatory-angiogenesis-of-internal-wound-in-diabetes
#9
Simone Aparecida de Almeida, Laura Alejandra Ariza Orellano, Luciana Xavier Pereira, Celso Tarso Rodrigues Viana, Paula Peixoto Campos, Silvia Passos Andrade, Monica Alves Neves Diniz Ferreira
Genetic susceptibility is associated with inflammation, neovascularization, and diabetes phenotypes. However, to what extent this susceptibility influences inflammatory angiogenesis in internal injuries in diabetes has not been fully investigated. Using the subcutaneous implantation of a synthetic matrix as an internal wound model in Swiss, C57BL/6 and Balb/c mice, we have studied inflammation, angiogenesis, and cytokine production in the fibrovascular tissue induced by implants in diabetic animals. The hyperglycemic levels (mg/dl) after the diabetogenic treatment were 455...
January 4, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28060505/%C3%AE-glucosidase-inhibitors-from-malbranchea-flavorosea
#10
Brisa Verastegui-Omaña, Daniela Rebollar-Ramos, Araceli Pérez-Vásquez, Ana Laura Martínez, Abraham Madariaga-Mazón, Laura Flores-Bocanegra, Rachel Mata
From an extract prepared from the grain-based culture of Malbranchea flavorosea two new polyketides, namely, 8-chloroxylarinol A (1) and flavoroseoside (2), along with the known compounds xylarinol A (3), xylarinol B (4), massarigenins B and C (5 and 6), and clavatol (7), were isolated. The structures of 1 and 2 were elucidated using spectroscopic methods and corroborated by single-crystal X-ray diffraction analysis. In the case of compound 2 the absolute configuration at the stereogenic centers was established according to the method of Flack...
January 6, 2017: Journal of Natural Products
https://www.readbyqxmd.com/read/28058711/hyperglycemia-is-associated-with-poor-survival-in-primary-central-nervous-system-lymphoma-patients
#11
Ayumi Debata, Koichi Yoshida, Kenta Ujifuku, Haruna Yasui, Kensaku Kamada, Daisuke Niino, Takayuki Matsuo
PURPOSE: Primary central nervous system lymphoma (PCNSL) is a type of non-Hodgkin lymphoma (NHL), and it has been postulated that metabolic disorder may contribute to NHL etiology. We retrospectively investigated the prognostic significance of hyperglycemia in patients with PCNSL. We evaluated glucose transporter type 1 (GLUT1) expression by immunohistochemistry and analyzed its association with hyperglycemia and survival. METHODS: The medical and neuroradiologic records of 50 patients with PCNSL at our institution over the past 15 years were analyzed...
December 29, 2016: Tumori
https://www.readbyqxmd.com/read/28056856/potential-unfavorable-impacts-of-bdnf-val66met-polymorphisms-on-metabolic-risks-in-average-population-in-a-longevous-area
#12
Jun-Hua Peng, Cheng-Wu Liu, Shang-Ling Pan, Hua-Yu Wu, Qing-Hua Liang, Rui-Jing Gan, Ling Huang, Yi Ding, Zhang-Ya Bian, Hao Huang, Ze-Ping Lv, Xiao-Ling Zhou, Rui-Xing Yin
BACKGROUND: Brain-derived neurotrophic factor (BDNF) has been implicated in cognitive performance and the modulation of several metabolic parameters in some disease models, but its potential roles in successful aging remain unclear. We herein sought to define the putative correlation between BDNF Val66Met and several metabolic risk factors including BMI, blood pressure, fasting plasma glucose (FPG) and lipid levels in a long-lived population inhabiting Hongshui River Basin in Guangxi...
January 5, 2017: BMC Geriatrics
https://www.readbyqxmd.com/read/28054648/niclosamide-reduces-glucagon-sensitivity-via-hepatic-pka-inhibition-in-obese-mice-implications-for-glucose-metabolism-improvements-in-type-2-diabetes
#13
Md Kamrul Hasan Chowdhury, Nigel Turner, Nicholas L Bentley, Abhirup Das, Lindsay E Wu, Dulama Richani, Sonia Bustamante, Robert B Gilchrist, Margaret J Morris, Peter R Shepherd, Greg C Smith
Type 2 diabetes (T2D) is a global pandemic. Currently, the drugs used to treat T2D improve hyperglycemic symptom of the disease but the underlying mechanism causing the high blood glucose levels have not been fully resolved. Recently published data showed that salt form of niclosamide improved glucose metabolism in high fat fed mice via mitochondrial uncoupling. However, based on our previous work we hypothesised that niclosamide might also improve glucose metabolism via inhibition of the glucagon signalling in liver in vivo...
January 5, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28051306/h2o2-responsive-vesicles-integrated-with-transcutaneous-patches-for-glucose-mediated-insulin-delivery
#14
Xiuli Hu, Jicheng Yu, Chenggen Qian, Yue Lu, Anna R Kahkoska, Zhigang Xie, Xiabin Jing, John B Buse, Zhen Gu
A self-regulated "smart" insulin administration system would be highly desirable for diabetes management. Here, a glucose-responsive insulin delivery device, which integrates H2O2-responsive polymeric vesicles (PVs) with a transcutaneous microneedle-array patch was prepared to achieve a fast response, excellent biocompatibility, and painless administration. The PVs are self-assembled from block copolymer incorporated with polyethylene glycol (PEG) and phenylboronic ester (PBE)-conjugated polyserine (designated mPEG-b-P(Ser-PBE)) and loaded with glucose oxidase (GOx) and insulin...
January 4, 2017: ACS Nano
https://www.readbyqxmd.com/read/28050889/clinical-pharmacokinetics-and-pharmacodynamics-of-albiglutide
#15
REVIEW
Andreas Brønden, Filip K Knop, Mikkel B Christensen
Albiglutide is a long-acting, glucagon-like peptide-1 receptor agonist for subcutaneous administration with a recommended dose of 30-50 mg once weekly. The aim of this article is to outline the pharmacokinetic and pharmacodynamic properties of albiglutide including the clinical efficacy and safety data underlying the approval of albiglutide for the treatment of type 2 diabetes mellitus in both Europe and USA. Albiglutide is cleared from the circulation (by a mechanism partially dependent on renal function) with an elimination half-life of 5 days, allowing once-weekly administration...
January 3, 2017: Clinical Pharmacokinetics
https://www.readbyqxmd.com/read/28042054/design-and-rationale-of-heart-and-lung-failure-pediatric-insulin-titration-trial-half-pint-a-randomized-clinical-trial-of-tight-glycemic-control-in-hyperglycemic-critically-ill-children
#16
Michael Sd Agus, Ellie Hirshberg, Vijay Srinivasan, Edward Vincent Faustino, Peter M Luckett, Martha Aq Curley, Jamin Alexander, Lisa A Asaro, Kerry Coughlin-Wells, Donna Duva, Jaclyn French, Natalie Hasbani, Martha T Sisko, Carmen L Soto-Rivera, Garry Steil, David Wypij, Vinay M Nadkarni
OBJECTIVES: Test whether hyperglycemic critically ill children with cardiovascular and/or respiratory failure experience more ICU-free days when assigned to tight glycemic control with a normoglycemic versus hyperglycemic blood glucose target range. DESIGN: Multi-center randomized clinical trial. SETTING: Pediatric ICUs at 35 academic hospitals. PATIENTS: Children aged 2weeks to 17years receiving inotropic support and/or acute mechanical ventilation, excluding cardiac surgical patients...
December 30, 2016: Contemporary Clinical Trials
https://www.readbyqxmd.com/read/28038474/inhibition-of-aldh2-by-o-glcnacylation-contributes-to-the-hyperglycemic-exacerbation-of-myocardial-ischemia-reperfusion-injury
#17
Baoshan Liu, Jiali Wang, Minghua Li, Qiuhuan Yuan, Mengyang Xue, Feng Xu, Yuguo Chen
Although hyperglycemia is causally related to adverse outcomes after myocardial ischemia/reperfusion (I/R), the underlying mechanisms are largely unknown. Here, we investigated whether excessive O-linked-N-acetylglucosamine (O-GlcNAc) modification of acetaldehyde dehydrogenase 2 (ALDH2), an important cardioprotective enzyme, was a mechanism for the hyperglycemic exacerbation of myocardial I/R injury. Both acute hyperglycemia (AHG) and diabetes (DM)-induced chronic hyperglycemia increased cardiac dysfunction, infarct size and apoptosis index compared with normal saline (NS)+I/R rats (P<0...
December 27, 2016: Oncotarget
https://www.readbyqxmd.com/read/28025449/metformin-enhances-osteogenesis-and-suppresses-adipogenesis-of-human-chorionic-villous-mesenchymal-stem-cells
#18
Qiaoli Gu, Yanzheng Gu, Huilin Yang, Qin Shi
Metformin is the first-line anti-hyperglycemic drugs commonly used to treat type 2 diabetes. Recent studies have shown that metformin can enhance bone formation through induction of endothelial nitric oxide synthase (eNOS). Human chorionic villous mesenchymal stem cells (CV-MSCs) are promising candidates for regenerative medicine. The present study aimed to investigate the effects of metformin on the osteogenic and adipocytic differentiation of human CV-MSCs, and to elucidate the underlying mechanism. CV-MSCs, prepared from human term placentae, were cultured with different concentrations of metformin...
2017: Tohoku Journal of Experimental Medicine
https://www.readbyqxmd.com/read/28017669/depression-can-be-prevented-by-astaxanthin-through-inhibition-of-hippocampal-inflammation-in-diabetic-mice
#19
Xiao-Yan Zhou, Fang Zhang, Xiao-Tong Hu, Jing Chen, Ren-Xian Tang, Kui-Yang Zheng, Yuan-Jian Song
The critical factor considered in a depression induced by diabetes is the inflammation eliciting hippocampal, amygdala and thalamic neuronal injury. Therefore, inhibiting inflammatory reactions in the brain and reducing neuronal injury can alleviate depression in rodents suffering from diabetes mellitus. The oral administration of astaxanthin has been employed in emotional disorders and diabetic complications due to its anti-depressant, anti-inflammatory and anti-apoptotic functions. However, it has not been reported whether astaxanthin can improve diabetes-related depression-like behavior, and its potential mechanisms have not been elucidated...
December 22, 2016: Brain Research
https://www.readbyqxmd.com/read/28011166/hyperglycemia-and-high-nitric-oxide-level-induced-oxidative-stress-in-the-brain-and-molecular-alteration-in-the-neurons-and-glial-cells-of-laboratory-mouse-mus-musculus
#20
Rashmi Richa, Arun Kumar Yadawa, Chandra Mohini Chaturvedi
Chronic hyperglycemia (glucotoxicity) is reported to have detrimental effects on various brain functions leading to neurodegenerative changes. However, the effect of hyperglycemia in combination with high nitric oxide (NO) level (reported to be increased during glucotoxicity), on brain functions is not clear yet. The present study was designed to investigate the effects of hyperglycemic drug Streptozotocin (STZ) and NO donor Sodium nitroprusside (SNP) on the brain of laboratory mouse, Mus musculus. Effects of these conditions were studied on the markers of oxidative stress, NF-κB signalling and the markers of neuronal and glial cell activation/inflammation...
December 20, 2016: Neurochemistry International
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